Lanthanum gallium silicate (La₃Ga₅SiO₁₄, LGS) crystal ndi ya tripartite crystal system, point group 32, space group P₃₂₁ (No.150). LGS ili ndi zotsatira zambiri monga piezoelectric, electro-optical, optical rotation, ndipo ingagwiritsidwe ntchito ngati laser material kudzera doping. Mu 1982, Kaminskyndi al. linanena kukula kwa doped LGS makhiristo. Mu 2000, makhiristo a LGS okhala ndi mainchesi atatu ndi kutalika kwa 90 mm adapangidwa ndi Uda ndi Buzanov.

LGS crystal ndi chinthu chabwino kwambiri cha piezoelectric chokhala ndi mtundu wodula wa zero kutentha kokwanira. Koma mosiyana ndi ntchito za piezoelectric, ma electro-optic Q-switching amafunikira mtundu wapamwamba wa kristalo. Mu 2003, Kongndi al. anakula bwino LGS makhiristo popanda zooneka macroscopic zolakwika pogwiritsa ntchito njira Czochralski, ndipo anapeza kuti kukula mumlengalenga zimakhudza mtundu wa makhiristo. Anapeza makhiristo opanda mtundu ndi imvi a LGS ndipo adapanga LGS kukhala EO Q-switch ndi kukula kwa 6.12 mm × 6.12 mm × 40.3 mm. Mu 2015, gulu limodzi kafukufuku University Shandong bwinobwino anakula LGS makhiristo ndi m'mimba mwake 50 ~ 55 mm, kutalika 95 mm, ndi kulemera 1100 g popanda zoonekeratu zolakwika zazikulu.

Mu 2003, gulu lofufuza lomwe latchulidwa pamwambapa ku yunivesite ya Shandong lidalola mtengo wa laser kudutsa mu kristalo wa LGS kawiri ndikuyika mbale yozungulira kotala kuti ithane ndi mawonekedwe ozungulira, motero adazindikira kugwiritsa ntchito mawonekedwe a kuwala kwa kristalo wa LGS. Yoyamba ya LGS EO Q-switch idapangidwa ndikugwiritsidwa ntchito bwino mu laser system.

Mu 2012, Wang ndi al. anakonza LGS electro-optic Q-switch ndi kukula kwa 7 mm × 7 mm × 45 mm, ndipo anazindikira kutulutsa kwa 2.09 μm pulsed laser laser (520 mJ) mu nyali yopukutira ya Cr, Tm, Ho: YAG laser system. . Mu 2013, 2.79 μm pulsed laser beam (216 mJ) idakwaniritsidwa mu nyali yopopera ya Cr, Er:YSGG laser, yokhala ndi pulse wide 14.36 ns. Mu 2016, Mandi al. adagwiritsa ntchito kusintha kwa 5 mm × 5 mm × 25 mm LGS EO Q mu Nd: LuVO4 laser system, kuti azindikire kubwerezabwereza kwa 200 kHz, yomwe ndi mlingo wapamwamba kwambiri wobwerezabwereza wa LGS EO Q-switched laser system yomwe yanenedwa poyera pakali pano.

Monga EO Q-switching material, LGS crystal imakhala ndi kutentha kwabwino komanso kuwonongeka kwakukulu, ndipo imatha kugwira ntchito pafupipafupi kubwerezabwereza. Komabe, pali mavuto angapo: (1) Zopangira za LGS crystal ndizokwera mtengo, ndipo palibe chochita bwino m'malo mwa gallium ndi aluminiyumu yomwe ili yotsika mtengo; (2) EO coefficient ya LGS ndi yaying'ono. Pofuna kuchepetsa mphamvu yogwiritsira ntchito pa malo owonetsetsa kuti pali malo okwanira, kutalika kwa kristalo kwa chipangizocho kumayenera kuwonjezereka motsatira, zomwe sizimangowonjezera mtengo komanso kumawonjezera kutaya.

LGS Crystal - WISOPTIC TECHNOLOGY